Which of the following causes AIDS (acquired immune deficiency syndrome)?
A) A viroid B) A prion C) A bacterium D) An archaea E) A virus
E
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Many dinosaur movies depict huge tree-like plants growing out of swamps. To what group would these "trees" likely belong? Select all correct choices
A. lycophytes B. cycads C. angiosperms D. bryophytes
Basal transcription in eukaryotes involves the action of only the core promoter
Indicate whether the statement is true or false
What are behaviors intended to attract a member of the opposite sex for mating?
a. intrasexual selection b. kin selection c. courtship displays d. mate-guarding
Groups of organisms that cannot be distinguished morphologically but have no gene flow between them, and are indeed evolutionary independent units, are known as ________ species
Fill in the blank(s) with correct word